dates: date and time utilities | ||||||||||||||||||||||||||||||||||
calendar for year [months] returns calendar for year, as a 12 element list argument is one or more numbers: year, months If no months are given, it defaults to all months. example: calendar 1998 5 6 +---------------------+---------------------+ | May | Jun | | Su Mo Tu We Th Fr Sa| Su Mo Tu We Th Fr Sa| | 1 2| 1 2 3 4 5 6| | 3 4 5 6 7 8 9| 7 8 9 10 11 12 13| | 10 11 12 13 14 15 16| 14 15 16 17 18 19 20| | 17 18 19 20 21 22 23| 21 22 23 24 25 26 27| | 24 25 26 27 28 29 30| 28 29 30 | | 31 | | +---------------------+---------------------+ get date from character string
form: [opt] getdate string
useful for input forms that have a date entry field
date forms permitted:
1986 5 23
May 23 1986
23 May 1986
and:
opt=0 (days first - default)
23 5 1986
opt=1 (months first)
5 23 1986
other characters allowed: ,-/:
if not given, century defaults to current
only first 3 characters of month are tested.
examples: 23/5/86; may 23, 1986; 1986-5-23
requires: valdate
format time stamps as: 2000-05-23 16:06:39.268 y. is one or more time stamps in 6!:0 format format time stamps as: 23 May 1998 16:06:39 y. is time stamp, if empty default to current time converts day numbers to dates converts day numbers to dates, converse <todayno> This conversion is exact and provides a means of performing exact date arithmetic. y. = day numbers x. = optional: 0 - result in form <yyyy mm dd> (default) 1 - result in form <yyyymmdd> example: todate 72460 1998 5 23 todate 0 1 2 3 + todayno 1992 2 27 1992 2 27 1992 2 28 1992 2 29 1992 3 1 converts dates to day numbers converts dates to day numbers, converse <todate> y. = dates x. = optional: 0 - dates in form <yyyy mm dd> (default) 1 - dates in form <yyyymmdd> 0 = todayno 1800 1 1, or earlier example: todayno 1998 5 23 72460 differences between pairs of dates. form: end tsdiff begin end, begin are vectors or matrices in form YYYY MM DD end dates should be later than begin dates method is to subtract dates on a calendar basis to determine integral number of months plus the exact number of days remaining. This is converted to payment periods, where # days remaining are calculated as: (# days)%365 example: 1994 10 1 tsdiff 1986 5 23 8.35799 timestamp representation as a single number
form: [opt] timerep times
opt=0 convert timestamps to numbers (default)
1 convert numbers to timestamps
timestamps are in 6!:0 format, or matrix of same.
examples:
tsrep 1800 1 1 0 0 0
0
":!.13 tsrep 1995 5 23 10 24 57.24
6165887097240
validate dates
form: valdate dates
dates is 3-element vector
or 3-column matrix
in form YYYY MM DD
returns 1 if valid
returns weekday from date, 0=Sunday ... 6=Saturday
arguments as for <todayno>, e.g.
5 = weekday 1997 5 23 = 1 weekday 19970523
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